Sanborn Street over Black River
PoorPosted for loadSanilac County, Michigan · City of Croswell · Structure no. 000000000009670
- Built
- 1974
- 51 years old
- Condition
- Poor
- inspected May 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 182 ft
- 3 main spans
- Daily traffic
- 850
- 1985 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Sanborn Street over Black River is a prestressed concrete tee beam carrying Sanborn Street over Black River in Sanilac County, Michigan. It was built in 1974, so it is 51 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 850 vehicles a day, roughly 2% of them trucks, projected to reach 1,000 by 2007. The structure is 182 ft (55.6 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sanborn Street over Black River built?
It was built in 1974, making it 51 years old in 2025.
What condition is Sanborn Street over Black River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does Sanborn Street over Black River carry?
About 850 vehicles per day (1985 count), of which roughly 2% are trucks.
How long is Sanborn Street over Black River?
The structure is 182 ft (55.6 m) long with a longest span of 61 ft (18.7 m) and a deck 34 ft wide.
Who owns Sanborn Street over Black River?
It is owned by the City or Municipal Highway Agency.